Method and apparatus for a transmission signal up-converting...

Details Method and apparatus for a transmission signal up-converting... Method and apparatus for a transmission signal up-converting...

2006-01-11

2009-10-20

Barnie, Rexford N (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

Data rate conversion

C332S103000

Reexamination Certificate

active

07605724

ABSTRACT:
A digital up-sampling converter (DUSC) employs a signal input provided by a digital signal process (DSP) at a first rate feeding a Square Root Raised Cosine (SRRC) filter which provides for table look up of filter coefficients for a multiple symbol span and provides a sampling output at a second rate which is a multiple M of the first rate. A digital to analog converter (DAC) receives the sampling output at the second rate for conversion to an analog signal and a low pass analog filter processes the analog signal for delivery to an RF transmitter.

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Yoichi Matsumoto, Shuji Kubota, Shuzo Kato; “High-Performance Coherent Demodulator LSIC for Wireless Personal Communications”; IEEE Transactions on Vehicular Technology, vol. 45, No. 3, Aug. 1996; pp. 475-483.
International Search Report from the PCT dated Aug. 18, 2006 International Application No. PCT/US06/01446; 4 pages.
Written Opinion from the PCT dated Aug. 18, 2006 for International Application No. PCT/US06/01446; 4 pages.

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